Mine flew beautifully on an OS 71FS. I wanted that engine for another airplane so I have a Saito 91 in it now; it has good vertical but not outstanding, so I think the 100 would be great! However, I would pin the firewall (drill in toothpicks or bamboo swewers), and reinforce all of the joints. This is a very light weight airframe for such a large airplane, so you will want to be careful with your throttle management. Oh yes, don't expect it to go fast. It is at its best flying slow, and doing outrageous airobatics. My club oohs and aahs at what it will do.